27 results on '"Zomer T"'
Search Results
2. Clinical characteristics of Lyme neuroborreliosis in Dutch children and adults
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van Samkar, A., Bruinsma, R. A., Vermeeren, Y. M., Wieberdink, R. G., van Bemmel, T., Reijer, P. M. den, van Kooten, B., and Zomer, T. P.
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- 2023
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3. Acute facial nerve palsy in children in a Lyme disease–endemic area in the Netherlands
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Bruinsma, R. A., Smulders, C. A., Vermeeren, Y. M., van Kooten, B., Cats, E. A., van Hees, B., van Hensbroek, M. Boele, Hovius, J. W., and Zomer, T. P.
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- 2021
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4. Prevalence and risk factors for colonization of Clostridium difficile among adults living near livestock farms in the Netherlands
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ZOMER, T. P., VAN DUIJKEREN, E., WIELDERS, C. C. H., VEENMAN, C., HENGEVELD, P., VAN DER HOEK, W., DE GREEFF, S. C., SMIT, L. A. M., HEEDERIK, D. J., YZERMANS, C. J., KUIJPER, E. J., and MAASSEN, C. B. M.
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- 2017
5. Incidence of pneumonia in nursing home residents with dementia in the Netherlands : an estimation based on three differently designed studies
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ZOMER, T. P., VAN DER MAADEN, T., VAN GAGELDONK-LAFEBER, A. B., DE GREEFF, S. C., VAN DER STEEN, J. T., and VERHOEF, L.
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- 2017
6. Improving hand hygiene compliance in child daycare centres : a randomized controlled trial
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ZOMER, T. P., ERASMUS, V., LOOMAN, C. W., VAN BEECK, E. F., TJON-A-TSIEN, A., RICHARDUS, J. H., and VOETEN, H. A. C. M.
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- 2016
7. A hand hygiene intervention to reduce infections in child daycare : a randomized controlled trial
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ZOMER, T. P., ERASMUS, V., LOOMAN, C. W., TJON-A-TSIEN, A., VAN BEECK, E. F., DE GRAAF, J. M., VAN BEECK, A. H. E., RICHARDUS, J. H., and VOETEN, H. A. C. M.
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- 2015
8. Design of a sustainable electric vehicle sharing business model in the Brazilian context.
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Moro, S. R., Cauchick-Miguel, P. A., de Sousa-Zomer, T. T., and de Sousa Mendes, G. H.
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ELECTRIC vehicles ,ELECTRIC vehicle design & construction ,BUSINESS models ,SUSTAINABILITY - Abstract
A product-service system (PSS) aims to improve the profitability and competitiveness of companies, generate superior value for customers, and contribute to sustainability. However, despite those benefits, manufacturing companies still find it difficult to structure their business models as PSS, especially regarding the design of sustainable business offers. Previous research on designing PSS business models has not integrated sustainability aspects and empirical evidence on how to design sustainable PSS business models remains limited, especially in contexts such as developing countries, where those offers have a great potential for sustainability improvements. Thus, this paper explores the practical design of a PSS business model for electric vehicle sharing in the Brazilian context, considering sustainable principles. An analysis of the challenges and opportunities of offering shared sustainable mobility in the Brazilian context is presented. The PSS business model is described considering an integrated approach focusing on the co-creation of value-in-use by the value network. The results aim to support practitioners in designing more sustainable PSS business models, generating superior value for the 'value network' of PSS and contributing toward expanding sustainable production and consumption knowledge. [ABSTRACT FROM AUTHOR]
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- 2023
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9. To What Extent Is Circular Product Design Supporting Carbon Reduction Strategies? An Analysis of Nordic Manufacturing Firms within the Science-Based Targets Initiative
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Zomer, T., primary, McAloone, T. C., additional, and Pigosso, D. C. A., additional
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- 2022
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10. A foodborne norovirus outbreak at a manufacturing company
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ZOMER, T. P., DE JONG, B., KÜHLMANN-BERENZON, S., NYRÉN, O., SVENUNGSSON, B., HEDLUND, K. O., ANCKER, C., WAHL, T., and ANDERSSON, Y.
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- 2010
11. To What Extent Is Circular Product Design Supporting Carbon Reduction Strategies? An Analysis of Nordic Manufacturing Firms within the Science-Based Targets Initiative
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Zomer, T., McAloone, T. C., Pigosso, D. C.A., Zomer, T., McAloone, T. C., and Pigosso, D. C.A.
- Abstract
Corporate climate action is critical in supporting the transition towards a low-carbon economy. This paper explores what design practices have been adopted by manufacturing companies that have committed to science-based emission reduction targets and are making progress towards those targets. We contribute to the existing literature by providing empirical evidence of circular economy (CE) actions related to product design supporting firms in reaching their emission reduction targets, contributing to the calls for more research showing evidence between CE adoption and emissions reduction.
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- 2022
12. Transmission of MRSA between humans and animals on duck and turkey farms
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van Duijkeren, E., Hengeveld, P., Zomer, T. P., Landman, F., Bosch, T., Haenen, A., and van de Giessen, A.
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- 2016
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13. Institutional pressures and decoupling in construction projects: An analysis of building information modelling implementation
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Zomer, T, Neely, A, and Parlikad, A
- Abstract
Most existing research on built environment policy has focused on the independent variable - policy formulation - and assumed that the prescriptions that follow are readily accepted by a multitude of stakeholders. Less focus has been placed on the dependent variable - the projects where those policies are applied. Studies on practical implementation of new policies, such as Building Information Modelling (BIM) mandates, however, have suggested that implementation has not happened as envisaged. In this paper, by drawing on institutional theory, specifically the concept of decoupling, we adopt the perspective of the implementers of built environment policy approaches to explore how projects respond to the environmental pressure of a BIM mandate and the implications of such responses to the wider transformation of the sector. Through an inductive research design and by conducting multiple case studies on BIM Level 2 projects in the United Kingdom, we observed that two variances of a decoupling phenomenon are happening across projects - policy - practice decoupling and means-end decoupling. Our findings revealed that the decoupling phenomenon manifested in the responses employed by projects when implementing the 'new working practices' part of the policy mandate. Those responses included non-implementation of practices, violation of implementation and assimilation of the practices but not their meaning. Underlying reasons for such responses were also identified. By adopting an implementers' perspective on built environment policy design and implementation, we contribute to the construction management literature by providing new insights on the slow transformation of the sector, differing from what is generally envisaged by built environment policies. Our findings call attention to the consideration of implementers' prior knowledge, by institutional designers, when designing policy.
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- 2020
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14. Exploring the influence of socio-historical constructs on BIM implementation: an activity theory perspective
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Zomer, T, Neely, A, Sacks, R, Parlikad, A, Neely, Andrew [0000-0001-8220-5242], Sacks, Rafael [0000-0001-9427-5053], Parlikad, Ajith [0000-0001-6214-1739], and Apollo - University of Cambridge Repository
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change management ,BIM mandate ,sector transformation ,BIM ,activity theory - Abstract
Building Information Modelling (BIM) has been widely seen as bringing a paradigm change to the construction industry. However, scholars have acknowledged that neither widespread BIM implementation nor the envisaged systemic changes within the sector have taken place. Despite acknowledging that the industry’s conditions and embedded contexts shape innovation diffusion, existing studies have not explored in any depth “how” the context might influence the episode of change when a new technology is introduced and the new practices accompanying that technology and old practices co-evolve. By adopting activity theory, its concepts of contradictions and multiple layers within the activity system, in this paper, we explore the interaction between situated and existing practices, or the “how” of implementation; that is, how the activity system is questioned and redefined during an episode of technological change. Drawing on data from multiple case studies, our findings demonstrate that situated practices related to the definition of information requirements, and the production and the handover of information were re-enacted following institutionalised socio-historical constructs (e.g. norms, rules, division of labour) at the industry and organisational levels. The findings provide insights regarding the inertia in the transformation of the sector as also deriving from re-enactments of socio-historical constructs that mediate the institutionalisation of situated practices. Our findings reveal re-enactment as part of the transformation process and contribute to calls for more realistic views on BIM implementation.
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- 2020
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15. Prevalence and risk factors for colonization of Clostridium difficile among adults living near livestock farms in the Netherlands
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Zomer, T P, VAN Duijkeren, E, Wielders, C C H, Veenman, C, Hengeveld, P, VAN DER Hoek, W, DE Greeff, S C, Smit, L A M, Heederik, D J, Yzermans, C J, Kuijper, E J, and Maassen, C B M
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Adult ,Male ,Livestock ,Clostridium difficile ,Middle Aged ,Anti-Bacterial Agents ,Young Adult ,Cross-Sectional Studies ,Residence Characteristics ,Risk Factors ,Clostridium Infections ,Prevalence ,Animals ,Humans ,Female ,Animal Husbandry ,Aged ,Netherlands - Abstract
A cross-sectional study was performed among 2494 adults not living or working on a farm to assess prevalence of Clostridium difficile (CD) colonization and risk factors in a livestock dense area. CD prevalence was 1·2%. Twenty-one persons were colonized with a toxigenic strain and nine with a non-toxigenic strain. CD-positive persons did not live closer to livestock farms than individuals negative for CD. Antibiotic exposure in the preceding 3 months was a risk factor for CD colonization (odds ratio 3·70; 95% confidence interval 1·25-10·95).
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- 2018
16. Staat van Zoönosen 2014
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Zomer T, Kramer T, Sikkema R, de Rosa M, Valkenburgh T, Friesema I, Roest HJ, van der Giessen J, van den Kerkhof H, Kortbeek T, van Pelt W, Braks M, Maassen K, D&V, and I&V
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RIVM rapport 2015-0151 - Abstract
De Staat van zoönosen geeft jaarlijks een overzicht van infectieziekten die overgaan van dier op mens, de zogenoemde zoönosen. Het gaat om de mate waarin meldingsplichtige zoönosen voorkomen en de ontwikkelingen daarvan op de lange termijn. Hierbij betreft het zowel het aantal ziektegevallen bij mensen als het voorkomen van deze ziekteverwekkers bij dieren. Ook worden elk jaar opmerkelijke voorvallen uitgelicht en wordt een thema behandeld. Voor de meeste zoönosen zijn in 2014 geen uitgesproken veranderingen waargenomen. Wel is het aantal mensen met leptospirose (waarvan de bekendste vorm de ziekte van Weil is) aanmerkelijk hoger dan het vorige jaar, van gemiddeld 30 gevallen in de afgelopen jaren naar 97 in 2014. Ook steeg het aantal Hantavirusinfecties (van gemiddeld 13 in de voorgaande jaren naar 36 in 2014). UItgelicht Een opmerkelijke gebeurtenis in 2014 is dat twee patiënten in een ziekenhuis zijn opgenomen met een ernstige longontsteking na een infectie met Chlamydia caviae. Beide patiënten bleken thuis cavia's te houden die een luchtweginfectie hadden doorgemaakt. Verder was er sinds 2003 weer een uitbraak van vogelgriep bij pluimveebedrijven veroorzaakt door een hoogpathogeen virus. Hierbij zijn vier van de vijf besmette bedrijven onafhankelijk van elkaar besmet geraakt. Het virus was vermoedelijk afkomstig van trekkende watervogels. Het is onbekend of dit virustype overdraagbaar is op de mens; wereldwijd zijn daar geen gevallen van bekend. Vogels Het thema van dit jaar is 'Onze gevleugelde vrienden' en gaat over zoönosen die via vogels kunnen worden overgebracht, zoals de papegaaienziekte. Hierbij wordt onder andere beschreven op welke vliegroutes van trekvogels gezamenlijke broed- en voederplaatsen liggen waar ze elkaar kunnen treffen en zoönoseverwekkers aan elkaar zouden kunnen overdragen.
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- 2017
17. Extended-spectrum β-lactamase- and pAmpC-producing Enterobacteriaceae among the general population in a livestock-dense area
- Author
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Wielders, C C H, van Hoek, A H A M, Hengeveld, P D, Veenman, C, Dierikx, C M, Zomer, T P, Smit, L A M, van der Hoek, W, Heederik, D J, de Greeff, S C, Maassen, C B M, van Duijkeren, E, LS IRAS EEPI GRA (Gezh.risico-analyse), and dIRAS RA-I&I RA
- Subjects
β-lactam resistance ,Risk factors ,Livestock farming ,Prevalence ,AmpC ,Environment ,Extended-spectrum β-lactamases ,Antimicrobial resistance - Abstract
OBJECTIVES: In the Netherlands there is an ongoing debate regarding environmental health risks of livestock farming for neighbouring residents. This explorative study aims to determine the prevalence of carriage of ESBL/pAmpC-producing Enterobacteriaceae (ESBL/pAmpC-E) in the general population living in a livestock-dense area, and to study associations between determinants, including exposure through contact with animals and the environment, and human carriage of ESBL/pAmpC-E. METHODS: A cross-sectional study was performed among 2,432 adults (aged 20-72 years) in twelve temporary research centres in the south of the Netherlands, consisting of a questionnaire and analysis of a faecal sample to assess carriage of ESBL/pAmpC-E. Risk factors were analysed using logistic regression. RESULTS: The prevalence for carriage of ESBL/pAmpC-E was 4.5% (109/2,432; 95%CI: 3.7-5.4) ranging from 1.4-10.9% among the research centres. ESBL/pAmpC resistance genes were detected in E. coli and K. pneumoniae isolates obtained from these 109 persons and the most common ESBL-resistance genes were blaCTX-M-15, blaCTX-M-14/17, and blaCTX-M-1, originating from 76 participants. Travel in the last twelve months to Africa, Asia or Latin America (OR: 2.82 (95%CI: 1.71-4.63)), having kept cows for a hobby (last five years) (OR: 3.77 (95%CI: 1.22-11.64)), usage of proton-pump inhibitors (OR: 1.84 (95%CI: 1.05-3.23)), and living within 1,000 metres of a mink farm (OR: 2.26 (95%CI: 1.28-3.98)) were identified as risk factors. Exposure to poultry was not identified as a risk factor. CONCLUSIONS: Overall, living in close proximity of livestock animals and farms does not seem to be a risk factor for carriage of ESBL/pAmpC-E.
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- 2017
18. Staat van Zoönosen 2014
- Author
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D&V, I&V, Zomer T, Kramer T, Sikkema R, de Rosa M, Valkenburgh T, Friesema I, Roest HJ, van der Giessen J, van den Kerkhof H, Kortbeek T, van Pelt W, Braks M, Maassen K, D&V, I&V, Zomer T, Kramer T, Sikkema R, de Rosa M, Valkenburgh T, Friesema I, Roest HJ, van der Giessen J, van den Kerkhof H, Kortbeek T, van Pelt W, Braks M, and Maassen K
- Abstract
RIVM rapport:De Staat van zoönosen geeft jaarlijks een overzicht van infectieziekten die overgaan van dier op mens, de zogenoemde zoönosen. Het gaat om de mate waarin meldingsplichtige zoönosen voorkomen en de ontwikkelingen daarvan op de lange termijn. Hierbij betreft het zowel het aantal ziektegevallen bij mensen als het voorkomen van deze ziekteverwekkers bij dieren. Ook worden elk jaar opmerkelijke voorvallen uitgelicht en wordt een thema behandeld. Voor de meeste zoönosen zijn in 2014 geen uitgesproken veranderingen waargenomen. Wel is het aantal mensen met leptospirose (waarvan de bekendste vorm de ziekte van Weil is) aanmerkelijk hoger dan het vorige jaar, van gemiddeld 30 gevallen in de afgelopen jaren naar 97 in 2014. Ook steeg het aantal Hantavirusinfecties (van gemiddeld 13 in de voorgaande jaren naar 36 in 2014). UItgelicht Een opmerkelijke gebeurtenis in 2014 is dat twee patiënten in een ziekenhuis zijn opgenomen met een ernstige longontsteking na een infectie met Chlamydia caviae. Beide patiënten bleken thuis cavia's te houden die een luchtweginfectie hadden doorgemaakt. Verder was er sinds 2003 weer een uitbraak van vogelgriep bij pluimveebedrijven veroorzaakt door een hoogpathogeen virus. Hierbij zijn vier van de vijf besmette bedrijven onafhankelijk van elkaar besmet geraakt. Het virus was vermoedelijk afkomstig van trekkende watervogels. Het is onbekend of dit virustype overdraagbaar is op de mens; wereldwijd zijn daar geen gevallen van bekend. Vogels Het thema van dit jaar is 'Onze gevleugelde vrienden' en gaat over zoönosen die via vogels kunnen worden overgebracht, zoals de papegaaienziekte. Hierbij wordt onder andere beschreven op welke vliegroutes van trekvogels gezamenlijke broed- en voederplaatsen liggen waar ze elkaar kunnen treffen en zoönoseverwekkers aan elkaar zouden kunnen overdragen., The Zoonotic Diseases Report provides an annual overview of infectious diseases transmitted from animals to humans, so-called zoonotic diseases or zoonoses. It focuses on the degree to which notifiable zoonoses occur and how they develop over the long term. Specifically, this concerns both the number of human cases and the occurrence of these pathogens in animals. Noteworthy incidents of zoonoses are also highlighted each year and a particular theme is discussed. For most zoonoses, no pronounced changes were observed in 2014. Nonetheless, the number of people with leptospirosis (of which the most well-known form is Weil's disease) was considerably higher than in the previous year, rising from an average of 30 cases in recent years to 97 cases in 2014. The number of Hantavirus infections also rose (from an average of 13 cases in the previous years to 36 cases in 2014). A closer look A notable event in 2014 is the admission of two patients to hospital with serious lung infections after being infected with Chlamydia caviae. Both patients kept guinea pigs at home that suffered from respiratory infections. There was also the first outbreak of highly pathogenic avian influenza since 2003 affecting five poultry farms. Four of the five farms became contaminated independently of each other. It is thought that the virus was transmitted from waterfowls. It is not known whether the particular virus strain can be transmitted to humans; worldwide no cases of such transmission have been reported. Birds This year's theme is 'Our winged friends'. It focuses on zoonoses that can be transmitted by birds, such as psittacosis (parrot fever). The migratory routes that coincide with shared breeding and feeding locations where migratory birds can come into contact with one another and thereby possibly transmit zoonotic pathogens to each other are also described.
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- 2015
19. Transmission of MRSA between humans and animals on duck and turkey farms
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van Duijkeren, E., primary, Hengeveld, P., additional, Zomer, T. P., additional, Landman, F., additional, Bosch, T., additional, Haenen, A., additional, and van de Giessen, A., additional
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- 2015
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20. Evaluatie Preventie Perinatale HBV transmissie. Cohort 1.1.2003 -31.12.2005 (HBIG 0,vaccin 2,4,11 mnd)
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EPI, Hahne SJM, Zomer T, van Heiningen FM, Boot H, Holty L, Abbink F, de Melker HE, EPI, Hahne SJM, Zomer T, van Heiningen FM, Boot H, Holty L, Abbink F, and de Melker HE
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- 2009
21. A foodborne norovirus outbreak at a manufacturing company
- Author
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ZOMER, T. P., primary, DE JONG, B., additional, KÜHLMANN-BERENZON, S., additional, NYRÉN, O., additional, SVENUNGSSON, B., additional, HEDLUND, K. O., additional, ANCKER, C., additional, WAHL, T., additional, and ANDERSSON, Y., additional
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- 2009
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22. Incidence and characteristics of Lyme neuroborreliosis in adult patients with facial palsy in an endemic area in the Netherlands.
- Author
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Bierman, S M, van Kooten, B, Vermeeren, Y M, Bruintjes, T D, van Hees, B C, Bruinsma, R A, Landman, G W, van Bemmel, T, and Zomer, T P
- Abstract
Making a distinction between facial palsy due to Lyme neuroborreliosis (LNB) and idiopathic facial palsy (IFP) is of importance to ensure timely and adequate treatment. The study objective was to assess incidence and patient characteristics of facial palsy due to LNB. Hospital records were reviewed of adult patients with facial palsy visiting the departments of neurology and/or otorhinolaryngology of Gelre hospitals between June 2007 and December 2017. Gelre hospitals are located in an area endemic for Lyme borreliosis. Patients with LNB had pleocytosis and intrathecal antibody production or pleocytosis with positive IgG serology. Patients with IFP had negative serology. Clinical characteristics were compared between patients with LNB and patients with IFP. Five hundred and fifty-nine patients presented with facial palsy, 4.7% (26) had LNB and 39.4% (220) IFP. The incidence of facial palsy due to LNB was 0.9/100 000 inhabitants/year. Over 70% of patients with facial palsy due to LNB did not report a recent tick bite and/or erythema migrans (EM). Patients with facial palsy due to LNB presented more often in July to September (69.2% vs. 21.9%, P < 0.001), and had more often headache (42.3% vs. 15.5%, P < 0.01). To reduce the risk of underdiagnosing LNB in an endemic area, we recommend testing for LNB in patients with facial palsy in summer months especially when presenting with headache, irrespective of a recent tick bite and/or EM. [ABSTRACT FROM AUTHOR]
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- 2019
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23. Skin autofluorescence as a tool for cardiovascular risk estimation in patients with rheumatoid arthritis.
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Bakker-Aling SH, van Woerkom JM, Zomer TP, Buscher HCJL, and van Bemmel T
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- Adult, Aged, Arthritis, Rheumatoid metabolism, Cardiovascular Diseases epidemiology, Female, Humans, Luminescent Measurements methods, Male, Middle Aged, Netherlands, Predictive Value of Tests, Prospective Studies, Risk Factors, Skin diagnostic imaging, Arthritis, Rheumatoid complications, Cardiovascular Diseases diagnosis, Glycation End Products, Advanced metabolism, Risk Assessment methods, Skin metabolism
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- 2019
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24. Non-specific symptoms in adult patients referred to a Lyme centre.
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Zomer TP, Barendregt JNM, van Kooten B, van Bemmel T, Landman GW, van Hees BC, and Vermeeren YM
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- Adolescent, Adult, Aged, Aged, 80 and over, Antibodies, Bacterial blood, Borrelia burgdorferi immunology, Cohort Studies, Fatigue etiology, Female, Humans, Immunoglobulin G blood, Lyme Disease blood, Male, Middle Aged, Netherlands, Prevalence, Serologic Tests, Sleep Wake Disorders etiology, Surveys and Questionnaires, Young Adult, Lyme Disease diagnosis, Lyme Disease physiopathology
- Abstract
Objectives: There is controversy whether non-specific symptoms can be related to previous Lyme borreliosis (LB). Positive serology can be considered a proxy for previous or persistent LB. We assessed non-specific symptoms and serology in patients suspected of LB referred to a Lyme centre., Methods: Included were adult patients who visited a Lyme centre between 2008 and 2014. Before medical consultation, serum samples were taken and questionnaires on non-specific symptoms completed. The prevalence of non-specific symptoms was calculated for patients with positive and negative IgG serology. Logistic regression was used to obtain odds ratios (ORs) with 95% confidence interval (CI) for an association between positive serology and non-specific symptoms., Results: Of 1439 included patients, 31.6% (455/1439) had positive serology. The most common non-specific symptoms were severe fatigue (61.4%, 883/1439), sleep disturbances (54.8%, 789/1439) and stiffness of neck/back (52.6%, 757/1439). The prevalence of severe fatigue was 53.0% (241/455) in patients with positive serology vs. 65.2% (642/984) in patients with negative serology (OR = 0.74; 95% CI, 0.58-0.94). The prevalence of sleep disturbances was respectively 46.2% (210/455) vs. 58.8% (579/984) (OR = 0.73; 95% CI, 0.58-0.93). The prevalence of stiffness of neck/back was respectively 47.7% (217/455) vs. 54.9% (540/984) (OR = 0.85; 95% CI, 0.67-1.06)., Conclusions: In patients referred to a Lyme centre, non-specific symptoms did not occur more frequently in patients with positive serology compared to patients with negative serology. Hence, a questionnaire on non-specific symptoms cannot be used for identifying patients with possible post-LB symptoms in clinical practice., (Copyright © 2018 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)
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- 2019
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25. Predictive value of Borrelia burgdorferi IgG antibody levels in patients referred to a tertiary Lyme centre.
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Zwerink M, Zomer TP, van Kooten B, Blaauw G, van Bemmel T, van Hees BC, Vermeeren YM, and Landman GW
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- Adult, Aged, Antibodies, Bacterial blood, Antigens, Bacterial immunology, Bacterial Proteins immunology, Borrelia burgdorferi immunology, Borrelia burgdorferi Group immunology, Cohort Studies, Enzyme-Linked Immunosorbent Assay methods, Female, Humans, Immunoblotting methods, Immunoglobulin M blood, Lyme Disease blood, Lyme Disease immunology, Male, Medical Records, Middle Aged, Predictive Value of Tests, Sensitivity and Specificity, Tertiary Care Centers, Borrelia burgdorferi isolation & purification, Immunoglobulin G blood, Lyme Disease diagnosis, Serologic Tests statistics & numerical data
- Abstract
A two-step testing strategy is recommended in serological testing for Lyme borreliosis; positive and indeterminate enzyme-linked immunosorbent assay (ELISA) results are confirmed with immunoblots. Several ELISAs quantify the concentration of antibodies tested, however, no recommendation exists for an upper cut-off value at which an IgG ELISA is sufficient and the immunoblot can be omitted. The study objective was to determine at which IgG antibody level an immunoblot does not have any additional predictive value compared to ELISA results. Data of adult patients who visited a tertiary Lyme centre between 2008 and 2014 were analysed. Both an ELISA (Enzygnost Lyme link VlsE IgG) and immunoblot (recomLine blot Borrelia) were performed. Clinical data were extracted from the patient's digital medical record. Positive predictive values (PPVs) for either previous or active infection with Borrelia burgdorferi s.l. were calculated for different cut-off ELISA IgG antibody levels where the immunoblot was regarded as reference test. In total, 1454 patients were included. According to the two-step test strategy, 486 (33%), 69 (5%) and 899 (62%) patients had positive, indeterminate and negative Borrelia IgG serology, respectively. At IgG levels of 500 IU/ml and higher, all immunoblots were positive, resulting in a 100% PPV (95% CI: 97.0-100). At IgG levels of 200 IU/ml and higher, the PPV was 99.3% (95% CI: 97.4-99.8). In conclusion, at IgG levels of 200 IU/ml and higher, an ELISA was sufficient to detect antibodies to Borrelia burgdorferi s.l. At those IgG levels, a confirmatory immunoblot may be omitted in patients referred to a tertiary Lyme centre. Before these results can be implemented in routine diagnosis of Lyme borreliosis, confirmation of the results is necessary in other patient populations and using other quantitative ELISAs and immunoblots., (Copyright © 2017 Elsevier GmbH. All rights reserved.)
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- 2018
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26. Extended-spectrum β-lactamase- and pAmpC-producing Enterobacteriaceae among the general population in a livestock-dense area.
- Author
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Wielders CCH, van Hoek AHAM, Hengeveld PD, Veenman C, Dierikx CM, Zomer TP, Smit LAM, van der Hoek W, Heederik DJ, de Greeff SC, Maassen CBM, and van Duijkeren E
- Subjects
- Adult, Aged, Animals, Comorbidity, Cross-Sectional Studies, Enterobacteriaceae drug effects, Environmental Exposure, Geography, Humans, Middle Aged, Netherlands epidemiology, Prevalence, Public Health Surveillance, Risk Factors, Young Adult, Bacterial Proteins genetics, Enterobacteriaceae genetics, Enterobacteriaceae Infections epidemiology, Enterobacteriaceae Infections microbiology, Livestock, beta-Lactamases genetics
- Abstract
Objectives: In the Netherlands there is an ongoing debate regarding environmental health risks of livestock farming for neighbouring residents. This explorative study aims to determine the prevalence of carriage of extended-spectrum β-lactamase and/or plasmid-mediated AmpC-producing Enterobacteriaceae (ESBL/pAmpC-E) in the general population living in a livestock-dense area, and to study associations between determinants, including exposure through contact with animals and the environment, and human carriage of ESBL/pAmpC-E., Methods: A cross-sectional study was performed among 2432 adults (aged 20-72 years) in 12 temporary research centres in the south of the Netherlands, consisting of a questionnaire and analysis of a faecal sample to assess carriage of ESBL/pAmpC-E. Risk factors were analysed using logistic regression., Results: The prevalence for carriage of ESBL/pAmpC-E was 4.5% (109/2432; 95% CI 3.7-5.4) ranging from 1.4% to 10.9% among the research centres. ESBL/pAmpC resistance genes were detected in Escherichia coli and Klebsiella pneumoniae isolates obtained from these 109 persons and the most common ESBL-resistance genes were bla
CTX-M-15 , blaCTX-M-14/17 and blaCTX-M-1 , originating from 76 participants. Travel in the previous 12 months to Africa, Asia or Latin America (OR 2.82; 95% CI 1.71-4.63), having kept cows for a hobby in the previous 5 years (OR 3.77; 95% CI 1.22-11.64), usage of proton-pump inhibitors (OR 1.84; 95% CI 1.05-3.23), and living within 1000 m of a mink farm (OR 2.26; 95% CI 1.28-3.98) were identified as risk factors. Exposure to poultry was not identified as a risk factor., Conclusions: Overall, living in close proximity to livestock animals and farms does not seem to be a risk factor for carriage of ESBL/pAmpC-E., (Copyright © 2016 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)- Published
- 2017
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27. Assessing the introduction of universal rotavirus vaccination in the Netherlands.
- Author
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Zomer TP, van Duynhoven YT, Mangen MJ, van der Maas NA, Vennema H, Boot H, and de Melker HE
- Subjects
- Adolescent, Child, Child, Preschool, Cost-Benefit Analysis, Humans, Infant, Infant, Newborn, Netherlands epidemiology, Rotavirus Vaccines economics, Rotavirus Vaccines immunology, Gastroenteritis epidemiology, Gastroenteritis prevention & control, Rotavirus Infections epidemiology, Rotavirus Infections prevention & control, Rotavirus Vaccines therapeutic use
- Abstract
Rotarix and RotaTeq are both prophylactic vaccines against rotavirus (RV) gastroenteritis. In 2006, these vaccines obtained a European license and because RV infections are widespread among Dutch children inclusion of these vaccines in the Dutch National Immunization Program (NIP) should be considered. Using an evaluation model for introducing a new vaccine, we assessed the introduction of universal RV vaccination in the Netherlands. Although post-marketing surveillance will be essential, both RV vaccines have proven to be safe and effective. Furthermore, the vaccines will prevent most of the RV-related hospitalizations and deaths. However, for the Netherlands with the current vaccine prices, universal RV vaccination is not expected to be cost-effective.
- Published
- 2008
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